A building formwork dismantling device for construction work

By designing a building formwork removal device with an adjustable-length crowbar and a detachable crow head, the problem of crowbars being unable to reach high-level formwork was solved, improving construction efficiency and reducing maintenance costs.

CN224396069UActive Publication Date: 2026-06-23CHINA STATE CONSTR ZHONGXIN CONSTR ENG CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHINA STATE CONSTR ZHONGXIN CONSTR ENG CO LTD
Filing Date
2025-06-03
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

The existing pry bar has a fixed length, making it difficult to reach high templates, resulting in low demolition efficiency. Furthermore, when the pry bar is damaged, the entire bar needs to be replaced, increasing maintenance costs.

Method used

A building formwork removal device was designed, which adopts an adjustable length pry bar structure and a detachable pry head. The pry bar length can be flexibly adjusted through components such as rotating sleeve, insert rod, screw rod, and moving rod. The pry head and pry bar are connected by structures such as cross groove and screw groove, so as to realize the detachable replacement of the pry head.

Benefits of technology

It enables flexible adjustment of the pry bar length, facilitating the removal of high-altitude formwork, reducing maintenance costs, and improving construction efficiency and tool utilization.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a kind of building template dismantling device for construction engineering, it is related to the technical field of construction engineering, including crowbar, the one end of crowbar is equipped with round groove, the inside of round groove is embedded and is slidably connected with moving rod, the other end of crowbar is equipped with embedded slot, the inside of embedded slot is embedded and is rotatably connected with embedded rod, the one end of crowbar is sleeved and is rotatably connected with rotating sleeve, the one end of embedded rod is fixedly connected with rotating sleeve, the one end of moving rod is embedded and is threadedly connected with screw rod.In the utility model, the crowbar in the building template dismantling device can be flexibly adjusted in length by rotating sleeve, embedded rod, screw rod, moving rod, limiting sliding slot and limiting sliding plate, etc.When it is necessary to remove the template at a high place, the crowbar can be extended, which facilitates the operation of workers and effectively solves the problem of fixed length of traditional crowbar that cannot reach the template at a high place, improving construction efficiency.
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Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to a building formwork removal device for building engineering. Background Technology

[0002] In construction engineering, formwork removal is a common and important task. Currently, crowbars are one of the most commonly used tools for formwork removal. Traditional crowbars have a relatively simple structure, typically consisting of a fixed-length crowbar and a crowbar head. However, in actual construction processes, with the diversification and complexity of building structures, the requirements for formwork removal tools are becoming increasingly demanding.

[0003] Existing crowbars have a fixed length, making them difficult for workers to reach when dealing with high-positioned formwork, hindering effective demolition work. Furthermore, the frequent contact between the crowbar head and the formwork during use easily leads to wear and damage. Since the existing crowbar heads and handles are mostly integrally molded, when the crowbar head is damaged, the entire crowbar often needs to be replaced, resulting in material waste and increased maintenance costs. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the existing technology where the length of the crowbar is fixed, making it difficult for workers to reach the formwork at higher positions and thus hindering effective demolition work. Therefore, this invention proposes a formwork demolition device for construction engineering.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a building formwork removal device for construction engineering, comprising a pry bar, one end of which has a circular groove, into which a movable rod is slidably connected and embedded; the other end of which has a recessed groove, into which a recessed rod is rotatably connected and embedded; one end of which is fitted with and rotatably connected to a rotating sleeve; one end of which is fixedly connected to the rotating sleeve; one end of which is fitted with and threadedly connected to a screw; the other end of which penetrates the inner wall of one end of the circular groove and is fixedly connected to one end of the recessed rod; one end of which is fixedly connected to a cylinder; one end of which has a cross groove, into which a cross plate is embedded; and a pry head is movably and fixedly connected to the cross plate.

[0006] Preferably, the inner wall of the circular groove is provided with four limiting slide grooves at equal intervals, and each limiting slide groove is embedded in and slidably connected to a limiting slide plate, which is fixedly connected to the surface of the moving rod.

[0007] Preferably, the inner wall of the groove is provided with three annular grooves at equal intervals, and each annular groove is fitted with and rotatably connected to an annular plate, and each annular plate is fixedly connected to the insert rod.

[0008] Preferably, a first anti-slip sleeve is fitted and fixedly connected to the surface of the rotating sleeve, and a second anti-slip sleeve is fitted and fixedly connected to the surface of the pry bar near the rotating sleeve.

[0009] Preferably, a threaded groove is formed on the inner wall of one end of the cross groove, and a protruding hole is formed inside the pry head and the cross plate. A screw is embedded and slidably connected inside the protruding hole, and one end of the screw is embedded inside the threaded groove and threadedly connected thereto.

[0010] Preferably, the head end of the pry bar is chamfered.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] 1. In this utility model, the crowbar in the formwork removal device can be flexibly adjusted in length through structures such as a rotating sleeve, insert rod, screw, moving rod, limiting slide groove, and limiting slide plate. When it is necessary to remove formwork at height, the crowbar can be extended, making it convenient for workers to operate. This effectively solves the problem that traditional crowbars with fixed lengths are difficult to reach high formwork, thus improving construction efficiency.

[0013] 2. In this utility model, the pry bar's pry head and pry bar are detachably connected, such as through a cross groove, screw groove, cross plate, screw, or other structure. When the pry head is damaged, only the pry head needs to be replaced, without replacing the entire pry bar, thus reducing maintenance costs and improving tool utilization. Attached Figure Description

[0014] Figure 1 This utility model provides a three-dimensional view of the overall structure of a formwork removal device for building engineering.

[0015] Figure 2 This utility model provides an overall structural sectional view of a formwork removal device for building engineering.

[0016] Figure 3 This utility model proposes a formwork removal device for building engineering. Figure 2 Enlarged view of the structure of area A in the middle;

[0017] Figure 4 This utility model proposes a formwork removal device for building engineering. Figure 2 Enlarged view of the structure in area B;

[0018] Figure 5 This utility model provides a partial three-dimensional structural view of a formwork removal device for building engineering.

[0019] Figure 6 This utility model provides a cross-sectional view of the overall structure of a formwork removal device for building engineering.

[0020] Legend: 1. Pry bar; 2. Circular groove; 3. Moving rod; 4. Limiting slide groove; 5. Limiting slide plate; 6. Insert groove; 7. Inserting rod; 8. Ring groove; 9. Ring plate; 10. Rotating sleeve; 11. First anti-slip sleeve; 12. Second anti-slip sleeve; 13. Screw; 14. Cylinder; 15. Pry bar; 16. Cross groove; 17. Threaded groove; 18. Protruding hole; 19. Cross plate; 20. Screw. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1, such as Figure 1-6 As shown, this utility model provides a formwork removal device for construction engineering, including a pry bar 1. One end of the pry bar 1 has a circular groove 2. A movable rod 3 is embedded and slidably connected inside the circular groove 2. The other end of the pry bar 1 has a recessed groove 6. A recessed rod 7 is embedded and rotatably connected inside the recessed groove 6. A rotating sleeve 10 is sleeved and rotatably connected to one end of the pry bar 1. One end of the recessed rod 7 is fixedly connected to the rotating sleeve 10. One end of the movable rod 3 is embedded and threadedly connected to a screw 13. The other end of the screw 13 passes through the inner wall of one end of the circular groove 2 and is fixedly connected to one end of the recessed rod 7. A cylinder 14 is fixedly connected to one end of the movable rod 3. A cross groove 16 is formed at one end of the cylinder 14. A cross plate 19 is embedded inside the cross groove 16. A pry head 15 is movably and fixedly connected to the cross plate 19.

[0024] The overall effect of embodiment 1 is as follows: A circular groove 2 is formed at one end of the pry bar 1, and a movable rod 3 is slidably connected and embedded inside the groove 2. A recessed groove 6 is formed at the other end of the pry bar 1, and a recessed rod 7 is rotatably connected and embedded inside the recessed groove 6. A rotating sleeve 10 is fitted onto and rotatably connected to one end of the pry bar 1. One end of the recessed rod 7 is fixedly connected to the rotating sleeve 10. A screw 13 is threadedly connected to one end of the movable rod 3, and the other end of the screw 13 penetrates the inner wall of one end of the circular groove 2 and is fixedly connected to one end of the recessed rod 7. This achieves the following effect: Rotating the rotating sleeve 10 can drive the insert rod 7 to rotate, which in turn drives the screw 13 to rotate. Rotating the screw 13 can drive the moving rod 3 to move inside the circular groove 2, thus adjusting the length of the device. A cylinder 14 is fixedly connected to one end of the moving rod 3. A cross groove 16 is provided at one end of the cylinder 14. A cross plate 19 is embedded inside the cross groove 16. A pry head 15 is fixedly connected to the moving cross plate 19, which can be used to embed and fix the pry head 15 through the cross groove 16 and the cross plate 19.

[0025] Example 2, as Figure 1-6 As shown, the inner wall of the circular groove 2 is provided with four equally spaced limiting grooves 4. Each limiting groove 4 is embedded in and slidably connected to a limiting slide plate 5. The limiting slide plate 5 is fixedly connected to the surface of the moving rod 3. The inner wall of the groove 6 is provided with three equally spaced annular grooves 8. Each annular groove 8 is embedded in and rotatably connected to an annular plate 9. The annular plate 9 is fixedly connected to the insert rod 7. The surface of the rotating sleeve 10 is fitted with and fixedly connected to a first anti-slip sleeve 11. The surface of the pry bar 1 and close to the rotating sleeve 10 is fitted with and fixedly connected to a second anti-slip sleeve 12. One end of the cross groove 16 is provided with a screw groove 17. The pry head 15 and the cross plate 19 are provided with protruding holes 18. A screw 20 is embedded in and slidably connected to the protruding hole 18. One end of the screw 20 is embedded in the screw groove 17 and threadedly connected to it. The head of the pry head 15 is chamfered.

[0026] The overall effect of embodiment 2 is as follows: four limiting grooves 4 are equally spaced on the inner wall of the circular groove 2. Limiting slide plates 5 are embedded and slidably connected inside each limiting groove 4. The limiting slide plates 5 are fixedly connected to the surface of the moving rod 3, thus limiting the moving rod 3. Three annular grooves 8 are equally spaced on the inner wall of the embedded groove 6. Ring plates 9 are embedded and rotatably connected inside each annular groove 8. The ring plates 9 are fixedly connected to the embedded rod 7, thus limiting and rotating the embedded rod 7. A first anti-slip sleeve 11 is fitted and fixedly connected to the surface of the rotating sleeve 10, and the surface of the pry bar 1 is close to... A second anti-slip sleeve 12 is fitted and fixedly connected to the near rotating sleeve 10, which facilitates the rotation of the rotating sleeve 10. A screw groove 17 is opened on the inner wall of one end of the cross groove 16. A protruding hole 18 is opened inside the pry head 15 and the cross plate 19. A screw 20 is inserted and slidably connected inside the protruding hole 18. One end of the screw 20 is inserted into the screw groove 17 and threadedly connected to it. This allows the screw 20 to pass through the protruding hole 18 and be embedded in the screw groove 17. Then, rotating the screw 20 can install and fix the pry head 15. The head end of the pry head 15 is chamfered, which facilitates the insertion of the pry head 15 into the gap between the template and the wall.

[0027] Working principle: When the length of the device needs to be adjusted, the rotating sleeve 10 can be rotated to drive the insert rod 7 to rotate, the insert rod 7 can be rotated to drive the screw 13 to rotate, the screw 13 can be rotated to drive the moving rod 3 to move inside the circular groove 2, and at the same time the limiting slide plate 5 can slide inside the limiting slide groove 4, which can make the moving rod 3 push the cylinder 14 to move, thus adjusting the length of the device. At the same time, when the pry head 15 is damaged, the screw 20 can be removed from the screw groove 17 with a tool, which can facilitate the replacement of the pry head 15.

[0028] The wiring diagrams of the pry bar 1 and pry head 15 in this utility model are common knowledge in the field, and their working principle is a well-known technology. The appropriate model is selected according to actual use. Therefore, the control method and wiring arrangement of the pry bar 1 and pry head 15 will not be explained in detail.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A formwork removal device for construction projects, comprising a pry bar (1), characterized in that: One end of the pry bar (1) has a circular groove (2), and a movable rod (3) is embedded and slidably connected inside the circular groove (2). The other end of the pry bar (1) has a recessed groove (6), and a rod (7) is embedded and rotatably connected inside the recessed groove (6). One end of the pry bar (1) is fitted with and rotatably connected to a rotating sleeve (10). One end of the rod (7) is fixedly connected to the rotating sleeve (10). One end of the movable rod (3) is embedded and threadedly connected to a screw (13). The other end of the screw (13) passes through the inner wall of one end of the circular groove (2) and is fixedly connected to one end of the rod (7). One end of the movable rod (3) is fixedly connected to a cylinder (14). One end of the cylinder (14) has a cross groove (16), and a cross plate (19) is embedded inside the cross groove (16). The movable cross plate (19) is fixedly connected to a pry head (15).

2. The formwork removal device for building construction according to claim 1, characterized in that: The inner wall of the circular groove (2) is provided with four limiting slide grooves (4) at equal intervals. Each limiting slide groove (4) is embedded in and slidably connected to a limiting slide plate (5). The limiting slide plate (5) is fixedly connected to the surface of the moving rod (3).

3. The formwork removal device for building construction according to claim 1, characterized in that: The inner wall of the groove (6) is provided with three annular grooves (8) at equal intervals. Each annular groove (8) is fitted with and rotatably connected to an annular plate (9). Each annular plate (9) is fixedly connected to the insert rod (7).

4. A formwork removal device for building construction according to claim 1, characterized in that: The surface of the rotating sleeve (10) is fitted with and fixedly connected to a first anti-slip sleeve (11), and the surface of the pry bar (1) and close to the rotating sleeve (10) is fitted with and fixedly connected to a second anti-slip sleeve (12).

5. A formwork removal device for building construction according to claim 1, characterized in that: A screw groove (17) is provided on the inner wall of one end of the cross groove (16). A protrusion (18) is provided inside the pry head (15) and the cross plate (19). A screw (20) is embedded and slidably connected inside the protrusion (18). One end of the screw (20) is embedded inside the screw groove (17) and threadedly connected to it.

6. A formwork removal device for building construction according to claim 1, characterized in that: The head of the pry bar (15) is chamfered.